Keymap name? I don't see gb or en_gb in the list.
Short-term I'll copy it from before the update.
Then there's another kmaps update coming soon, someone on the Puppy forums wrote a 2-page essay about the lackings of kmaps.tcz, partially some easy-to-fix parts, partially expecting me to manually inspect every one of the ~155 keymaps. I'm treating that as a bug report and will do an update to fix every non-manual issue.
I'll just let it be known that I can only test with keyboards available to me (fi, de, us) and I count on the community to report if others do not work.